Old AM servos on new FM Radios
I have a couple of very olf Futaba servo's which I still use with my modern PCM/FM radio gear.
I think the centre position used to be 1.3mS, whereas modern servo's are 1.5mS.
They can easilly be converted by cutting off the old connectors and fitting new ones, or soldering on a new cable end if you don't have the right crimping pliers.
Then the servo needs to be repositioned, twisted round a little bit, to move the centre in line with modern radio gear.
Hope this helps.